main.cpp

00001 #include "mbed.h"
00002 #include "SimpleDMA.h"
00003 #include <algorithm>
00004  
00005 RawSerial pc(USBTX, USBRX); // PC tx, rx
00006 RawSerial device(PTE0, PTE1); // UART1 tx, rx
00007  
00008 DigitalOut led1(LED_RED);
00009 DigitalOut led2(LED_GREEN);
00010 
00011 SimpleDMA dma_pc;
00012 SimpleDMA dma_device;
00013     
00014 int main() 
00015 {   
00016     // Enable the TX and RX dma on UART1
00017     UART1->C2 |= UART_C2_RIE_MASK | UART_C2_TIE_MASK ;  
00018     UART1->C4 |= UART_C4_RDMAS_MASK | UART_C4_TDMAS_MASK;
00019   
00020     // TODO: Configure dma_device to transfer data from UART1 to UART0
00021     // ...
00022     
00023     uint8_t buffer[128];
00024     uint8_t buffer_ptr = 0; 
00025 
00026     while(1) {
00027         char c = pc.getc();    
00028         buffer[buffer_ptr] = c;
00029         buffer_ptr = (buffer_ptr + 1) % sizeof(buffer);   
00030         
00031         if(c == '\r')
00032         {
00033             buffer[buffer_ptr] = '\n';
00034             ++buffer_ptr;
00035             
00036             led2 = !led2;
00037             
00038             // TODO: Trigger dma_pc to transfer data from the buffer to UART1
00039             // ....
00040             
00041             buffer_ptr = 0;
00042         }                               
00043     }
00044 }
00045 
00046